ch(Tests) Test event status updates if event has no attendees (#275)

- Test that the event status on calendar is updated even if the event has no attendees

[Finishes #168261994]

server/graphql_schemas/tests/utils/test_helpers.py

@@ -3,10 +3,12 @@
 from graphql_schemas.utils.helpers import update_event_status_on_calendar, remove_event_from_all_calendars
 from api.tests.base_test_setup import BaseSetup
 
+
 class HelperTests(BaseSetup):
     """
     Tests the helper functions and methods
     """
+
     def test_update_event_status_on_calendar(self):
         """
         Test method that update the event status on calendar
@@ -29,6 +31,25 @@ def test_update_event_status_on_calendar(self):
         self.assertEqual(mock_build.call_count, 2)
         mock_build_patcher.stop()
 
+    def test_udpate_event_status_if_there_are_no_attendees(self):
+        """
+        Test that event status on calendars is updated
+        if there are no initial attendees for the event
+        """
+
+        mock_build_patcher = patch('graphql_schemas.utils.helpers.build')
+        user, event = self.andela_user1, self.event_1
+        mock_build = mock_build_patcher.start()
+        # the mocked return value does not have the `attendees` list
+        mock_build.return_value.events.return_value.get.return_value.execute.return_value = {}
+        mock_build.return_value.events.return_value.patch.return_value.execute.return_value = 'event updated'
+        update_event_status_on_calendar(user, event)
+        self.assertEqual(mock_build.called, True)
+        self.assertEqual(mock_build.return_value.events.return_value.patch.called, True)
+        self.assertEqual(mock_build.return_value.events.return_value.get.called, True)
+        self.assertEqual(mock_build.call_count, 2)
+        mock_build_patcher.stop()
+
     def test_remove_event_from_all_calendar(self):
         """
         Test method that update the event status on calendar